[philtar]

Your opinion should be rejected outright for offering no alternatives.

[driminicus]

Start using riot.im it's Foss, and federated (with a very cool end to end encryption I might add).

If you prefer a more classical voice chat use mumble.

[SauciestGNU]

Matrix (the protocol riot uses) includes voice and video, and riot.im supports both. I run a matrix server for some friends and we like it a lot, though some of us still prefer IRC.